Gurobi 5.0.1 (linux64) logging started Fri Nov 16 17:46:46 2012 Optimize a model with 4455 rows, 9900 columns and 22869 nonzeros Presolve removed 34 rows and 3366 columns Presolve time: 0.13s Presolved: 4421 rows, 6534 columns, 19503 nonzeros Variable types: 0 continuous, 6534 integer (6534 binary) Found heuristic solution: objective 18.0000000 Found heuristic solution: objective 2.0000000 Root relaxation: cutoff, 3877 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 cutoff 0 2.00000 1.00000 50.0% - 0s Explored 0 nodes (3877 simplex iterations) in 0.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%